In a statement, Mr Mallett’s daughter Dawn said her father had appeared distant, confused and quiet following the death of his wife last May and on the day his body was found was due to attend his brother’s funeral.

Assistant Suffolk Coroner Dr Daniel Sharpstone said police found Mr Mallett’s car at a ‘strange angle’ near the lakes’ car park entrance with the keys in the ignition.

Recording a conclusion that Mr Mallett died as a result of drowning, Dr Sharpstone said: “It is difficult to know why he drove to the lakes at that time. He drove late at night and left the keys in. It may be that he was confused.”